101439253 has 4 divisors (see below), whose sum is σ = 101746048. Its totient is φ = 101132460.

The previous prime is 101439229. The next prime is 101439257. The reversal of 101439253 is 352934101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101439253 - 2⁹ = 101438741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101439257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152901 + ... + 153562.

It is an arithmetic number, because the mean of its divisors is an integer number (25436512).

Almost surely, 2^101439253 is an apocalyptic number.

It is an amenable number.

101439253 is a deficient number, since it is larger than the sum of its proper divisors (306795).

101439253 is an equidigital number, since it uses as much as digits as its factorization.

101439253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306794.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 101439253 is about 10071.7055655931. The cubic root of 101439253 is about 466.3750917271.

The spelling of 101439253 in words is "one hundred one million, four hundred thirty-nine thousand, two hundred fifty-three".